An intuitive introduction to the evolution of physical systems.

We outline a unified introduction to the general problem of dynamics intended for a high school students audience. The attempt consists in circumventing the lack of mathematical knowledge with the use of (1) geometric diagrams, (2) a discretised version of the equations of motion and(3) a simplified form of computation and analysis of their solutions. The aim is to allow students to approach theoretical features as well as computational aspects of the evolution equations through the use of spreadsheets, a work environment students are usually familiar with and an ideal tool for an intuitive approach to recursive algorithms. The proposal was presented to an audience composed of students of university physics teaching courses and high school Science teachers.